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18 November 2019 Design evaluation of the tilt mirror and groove feature for flat thermal image of the blackbody unit
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Abstract
The BlackBody Unit (BBU) mounted in front of the IR optical system is located off the optical path to avoid any thermal noise induced by the unit. To perform a thermal calibration of the optical system, a mirror is inserted in the optical path to refract the optical path toward the BBU during the calibration mode. To maximize the performance of the BBU, it is required to fill the Focal Plane Array (FPA) with the thermal irradiance as even as possible. To verify the performance of the BBU during the calibration mode, a ray tracing is performed. As a result, it is confirmed the uniformity of the thermal signal to be smaller than 0.01K when the BBU has the thermal distribution of 1K.
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jinsuk Hong, Pil Gyeong Choi, Munshin Jo, Kyoungmuk Lee, Jeeyeon Yoon, Dai Ho Ko, and Eung-shik Lee "Design evaluation of the tilt mirror and groove feature for flat thermal image of the blackbody unit", Proc. SPIE 11196, Infrared, Millimeter-Wave, and Terahertz Technologies VI, 1119610 (18 November 2019); https://doi.org/10.1117/12.2537084
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